30816140 has 12 divisors (see below), whose sum is σ = 64713936. Its totient is φ = 12326448.

The previous prime is 30816127. The next prime is 30816143. The reversal of 30816140 is 4161803.

It is not an unprimeable number, because it can be changed into a prime (30816143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770384 + ... + 770423.

It is an arithmetic number, because the mean of its divisors is an integer number (5392828).

Almost surely, 2^30816140 is an apocalyptic number.

It is an amenable number.

30816140 is an abundant number, since it is smaller than the sum of its proper divisors (33897796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30816140 is a wasteful number, since it uses less digits than its factorization.

30816140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540816 (or 1540814 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 30816140 is about 5551.2286928211. The cubic root of 30816140 is about 313.5157857959.

Adding to 30816140 its reverse (4161803), we get a palindrome (34977943).

The spelling of 30816140 in words is "thirty million, eight hundred sixteen thousand, one hundred forty".